摘要：温湿度控制已成为当今社会研究的热门项目。是工农业生产过程中必须考虑的因素。作为最常见的被控参数。温度和湿度已经不再是相互独立的物理量，而应在系统中综合考虑。广泛应用于实验室、大棚、花圃、智能仓储乃至土壤等各个领域。而传统的温湿度控制过程则利用湿度表、双金属式测量计和湿度试纸等测温湿度器材。通过人为进行检测。对超标温度和湿度要求的库房进行通风、降温、去湿等操作。但这种人工测试方法十分麻烦，效率低下。因此就需要一种制造廉价、使用灵活并且计算精确的温湿度控制仪器。利用单片机对温、湿度控制，具有控温、湿精度高、功能强、体积小、价格低，简单灵活等优点，很好的满足了工艺要求。73163

本文通过使用STC89C52单片机、DHT11传感器模块、1602液晶显示屏模块以及报警模块。简单明了的实现的可提要求,DHT11数字温湿度传感器把采集到的温湿度数据传给单片机,再经过单片机的处理准确的显示到液晶屏上，并对温湿度设置上下限，越限报警。

毕业论文关键词：DHT11传感器　1602液晶显示屏　STC89C52　报警 

Abstract: The temperature and humidity control has become a popular project in today's social studies。 Is the industry and agriculture production process must consider the factors。 As the most common is accused of parameters。 Temperature and humidity is no longer is independent of each other physical quantities, and in the system should be considered。 Widely used in laboratory, awning, flower bed, granaries and soil, and other fields。 While the traditional temperature and humidity control is use of humidity table, hair humidity table, double metal type gauge and humidity dipstick test equipment。 Through the artificial testing。 Not in conformity with the requirements of the temperature and humidity supply cooling, ventilation, to wet operation。 This artificial testing time-consuming, the efficiency is low。 Cut large randomness。 Error。 Hence the need for a cheap and easy to use and the calculating accurate temperature and humidity control instruments。 Using single chip microcomputer to control temperature and humidity, temperature control, wet with high precision and strong function, small volume, low price, advantages, such as simple nimble, meet the technological requirements。 

This article through the use of STC89C52 microcontroller, DHT11 sensor module, 1602 LCD screen module and alarm module。 Simple and clear implementation can be asked。 DHT11 digital temperature and humidity sensors to the acquisition of temperature and humidity data to the microcontroller。 The processing of single chip。 Accurate displayed on the LCD panel。 And the temperature and humidity on the set limit。 The limit alarm。 

Key words:  Singlechip   DHT11 sensor  1602 LCD screen　STC89C52　Alar

目  录

1  前言 7

1。1  研究的背景 7

1。2　研究的意义 7

1。3　研究的主要内容 7

1。4　研究的工作原理 8

2  系统总体方案设计 8

2。1　功能要求 8

2。2　设计思路 8

2。3　方案选择 9

2。3。1　传感器选择方案 9

2。3。2　显示器选择方案 9

2。3。3　单片机主芯片选择方案